* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: #fff;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    text-align: center;
    max-width: 450px;
    width: 100%;
}

h1 {
    color: #4a4a8a;
    margin-bottom: 5px;
    font-size: 2rem;
}

.instructions {
    color: #666;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.ring-container {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto 20px;
}

#letter-ring {
    position: absolute;
    width: 100%;
    height: 100%;
}

.letter-btn {
    position: absolute;
    width: 55px;
    height: 55px;
    border-radius: 50%;
    border: 3px solid #667eea;
    background: #fff;
    color: #4a4a8a;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.letter-btn:hover {
    background: #4930a0;
    color: #fff;
    transform: scale(1.1);
}

.letter-btn.selected {
    background: #4930a0;
    color: #fff;
    transform: scale(1.15);
    border-color: #764ba2;
    box-shadow: 0 0 15px rgba(118, 75, 162, 0.5);
}

.letter-btn.used {
    opacity: 0.4;
    pointer-events: none;
}

#center-letter {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #4930a0;
    color: #fff;
    font-size: 2rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
    text-transform: uppercase;
    border: 0;
    padding: 0;
    font: inherit;
}

#center-letter:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

#center-letter.selected {
    background: #4930a0;
    box-shadow: 0 0 25px rgba(118, 75, 162, 0.6);
}

#center-letter.used {
    opacity: 0.4;
    pointer-events: none;
}

.word-display {
    background: #f5f5f5;
    border-radius: 10px;
    padding: 15px;
    min-height: 50px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

#current-word {
    font-size: 1.8rem;
    font-weight: bold;
    color: #4a4a8a;
    letter-spacing: 3px;
    text-transform: uppercase;
    min-width: 100px;
}

#clear-word {
    background: #b42318;
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

#clear-word:hover {
    background: #8f1d14;
    transform: scale(1.1);
}

.controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.controls button {
    padding: 12px 25px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
}

#submit-word {
    background: #4930a0;
    color: #fff;
}

#submit-word:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

#shuffle {
    background: #ffd93d;
    color: #333;
}

#shuffle:hover {
    background: #ffc107;
    transform: translateY(-2px);
}

#hint {
    background: #287a35;
    color: #fff;
}

#hint:hover {
    background: #1e6329;
    transform: translateY(-2px);
}

.stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.stats p {
    margin: 0;
    color: #666;
    font-size: 0.95rem;
}

.stats span {
    color: #4a4a8a;
    font-weight: bold;
}

.found-words {
    background: #f9f9f9;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 20px;
    max-height: 150px;
    overflow-y: auto;
}

.found-words h3 {
    margin: 0 0 10px;
    color: #4a4a8a;
    font-size: 1rem;
}

#found-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.found-word {
    background: #4930a0;
    color: #fff;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    text-transform: uppercase;
    animation: pop 0.3s ease;
}

.navigation {
    margin-bottom: 15px;
}

#next-puzzle {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: #fff;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

#next-puzzle:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(56, 239, 125, 0.4);
}

#message {
    min-height: 25px;
    color: #666;
    font-weight: 500;
    margin: 0;
}

#message.success {
    color: #287a35;
}

#message.error {
    color: #b42318;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    animation: slideIn 0.3s ease;
}

.modal-content h2 {
    color: #4a4a8a;
    margin-bottom: 15px;
}

.modal-content p {
    color: #666;
    margin-bottom: 10px;
}

#modal-next {
    background: #4930a0;
    color: #fff;
    border: none;
    padding: 15px 40px;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 15px;
    transition: all 0.2s ease;
}

#modal-next:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

/* Music Controls */
.music-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.95);
    padding: 10px 15px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 5px;
    align-items: center;
}

.music-controls button {
    background: #4930a0;
    color: #fff;
    border: none;
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.music-controls button:hover {
    background: #4930a0;
}

.song-name {
    font-size: 0.75rem;
    color: #666;
    max-width: 120px;
    text-align: center;
}

/* Animations */
@keyframes pop {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

@keyframes celebrate {
    0% { transform: scale(1); }
    25% { transform: scale(1.05) rotate(-2deg); }
    50% { transform: scale(1.1); }
    75% { transform: scale(1.05) rotate(2deg); }
    100% { transform: scale(1); }
}

.shake {
    animation: shake 0.3s ease;
}

.celebrate {
    animation: celebrate 0.5s ease;
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 1.6rem;
    }

    .ring-container {
        width: 240px;
        height: 240px;
    }

    .letter-btn {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }

    #center-letter {
        width: 55px;
        height: 55px;
        font-size: 1.6rem;
    }

    #current-word {
        font-size: 1.4rem;
    }

    .controls button {
        padding: 10px 18px;
        font-size: 0.9rem;
    }

    .music-controls {
        bottom: 10px;
        right: 10px;
        padding: 8px 10px;
    }
}